Nervous system Definition and 22 Threads

TL;DR Summary: Location of cell bodies of neurons. ***The cell bodies of which of the following neurons are present in the grey matter of the spinal cord?*** *(a) Motor neuron and Sensory neuron (b) Association neuron and Motor neuron (c) Sensory neuron and Association neuron (d) Sensory...

Hello, I have some trouble understanding the role of the sympathetic nervous system in vasoconstriction and vasodilatation of blood vessels, I searched and found contradicting resources, does anyone have the right answer?

I was thinking how nerve impulses may differ from each other, if at all they do differ. I searched on Google, but the answers didn't provide a satisfactory answer to my question. Take, for example, the human eye. The cone cells are responsible for vision on bright light, and they have the...

Is it in anyway possible to use the "propagation of action potential" and an artificial myelin sheath in modern technology? Would this method overcome the problem of resistance? I found that superconductors have zero resistance but are too expensive. So ceramic can be used, but that is brittle...

This might be an obvious question, but is there any tissue functionality in the body that the nervous system is not involved or implicated in? What I mean is, is there any process that doesn't need the nervous system's involvement and does its functionality independently and not related to it...

http://www.nature.com/nature/journal/v421/n6921/full/421328a.html Would you know other researches about this? the connection between inflammation and the nervous system?

In explanations of the nervous and endocrine systems, so far, I have only heard that they influence each other or work together in some way. Can anyone give me an example or two on how exactly the nervous system would influence/activate/stimulate the endocrine system? And if vice versa? Many...

I was wondering if reflex is exclusively under the umbrella of the autonomic nervous system, or are there some reflexes that for some reason or definition, that would be associated with another nervous system? I did find in some articles that somatic nervous system also has its own types of...

I recently learned about Magnetic fields and the force they apply on moving charged particles.I had read in biology that the nervous system works on electrical impulses.My question is,do magnetic fields affect the nervous system?Do they apply a force on the nerves? I know this may not be the...

In part branching off a discussion here, but also a discussion I've always been interested in having. I also want to take some time to answer the question in that thread: axo-axonic gap junctions in the hippocampus are thought to play a role in generating ultra-fast oscillations that have a...

Is is true that "Sympathetic nervous system activates your heart and major skeletal muscles? Thank you for your help!

How does body motion control occur? For example, walking on high heels during a strong wind is pretty hard. There is a compressible fluid flow across the body, the center of mass is changing all the time, you have to balance on a tiny surface area, sensor data from the skin, eyes, ears, etc...

I appear to have a very specific need, I require some sort of a book that covers the human nervous system from a to z, I need to know everything about it, what it's made of, what each part's function are, how the nerves behave at each particular sections of the body, the calculations that are...

In the movie Law Abiding Citizen, there's a scene where a guy gets paralysed by a puffer fish toxin I think it was (maybe tetrodotoxin) and the guy who paralysed him explained that "the toxin completely disables your ability to move your muscles but it leaves all the other neurological functions...

[b]1. Create the nervous system of a simple fictional sea creature which is round with a single tail controlled by two antagonistic muscles. You may only use two light-sensitive neurons, but as many excitatory and/or inhibitory neurons as you wish. Each neuron used must be either entirely...

Maybe this should be posted in biology but it seems more like an electricity question to me: I've read that static electricity increases in the cold because of lower relative humidity. This seems to mean that it is more difficult for things to dissipate/ground their electric charge to the...

Hello everyone, I have a quick question. Ok the endoneurium is a layer of delicate connective tissue that encloses the myelin sheath of a nerve fiber within a fasciculus. Now my question is supporting cells of the nervous system like glial cells usually connect two nerve fibres together, so...

To my (limited) understanding, the peripheral nervous system sends messages of pain in the form of electrical impulses to the brains. But what's the difference between signals of extreme pain and mild pain/touch?

Hi, my AP bio class is going over the nervous system, and brain structure and eventually will be discussing diseases that attack the nervous system. Does anyone have any good examples I could bring up? I also am looking for an answer as to why in multiple sclerosis the myelin sheaths are...

Would someone explain me, please, the sentence in bold? My doubt is why signals jumping from node to node travel hundreds of times faster than signals traveling along the surface of the axon.

Can anyone hook me up with some good sites that describe the science behind how cocaine affects the human nervous system? I've searched by found little quality I'll be grateful is you can procide me with any sites/info.

I have some questions : :smile: 1> Would you please tell me what slows down the development of human nervous system ? 2> A situation: A very cute two year old baby was playing with his toys: I let him see a pink ball, ten times. Then let him see a blue ball. I tried to observe his actions and...